/* -----------------------------------------------
/* Author : Vincent Garreau  - vincentgarreau.com
/* MIT license: http://opensource.org/licenses/MIT
/* Demo / Generator : vincentgarreau.com/particles.js
/* GitHub : github.com/VincentGarreau/particles.js
/* How to use? : Check the GitHub README
/* v2.0.0
/* ----------------------------------------------- */

var pJS = function(tag_id, params) {

	var canvas_el = document.querySelector('#' + tag_id + ' > .particles-js-canvas-el');

	/* particles.js variables with default values */
	this.pJS = {
		canvas: {
			el: canvas_el,
			w: canvas_el.offsetWidth,
			h: canvas_el.offsetHeight
		},
		particles: {
			number: {
				value: 400,
				density: {
					enable: true,
					value_area: 800
				}
			},
			color: {
				value: '#fff'
			},
			shape: {
				type: 'circle',
				stroke: {
					width: 0,
					color: '#ff0000'
				},
				polygon: {
					nb_sides: 5
				},
				image: {
					src: '',
					width: 100,
					height: 100
				}
			},
			opacity: {
				value: 1,
				random: false,
				anim: {
					enable: false,
					speed: 2,
					opacity_min: 0,
					sync: false
				}
			},
			size: {
				value: 20,
				random: false,
				anim: {
					enable: false,
					speed: 20,
					size_min: 0,
					sync: false
				}
			},
			line_linked: {
				enable: true,
				distance: 100,
				color: '#fff',
				opacity: 1,
				width: 1
			},
			move: {
				enable: true,
				speed: 2,
				direction: 'none',
				random: false,
				straight: false,
				out_mode: 'out',
				bounce: false,
				attract: {
					enable: false,
					rotateX: 3000,
					rotateY: 3000
				}
			},
			array: []
		},
		interactivity: {
			detect_on: 'canvas',
			events: {
				onhover: {
					enable: true,
					mode: 'grab'
				},
				onclick: {
					enable: true,
					mode: 'push'
				},
				resize: true
			},
			modes: {
				grab: {
					distance: 100,
					line_linked: {
						opacity: 1
					}
				},
				bubble: {
					distance: 200,
					size: 80,
					duration: 0.4
				},
				repulse: {
					distance: 200,
					duration: 0.4
				},
				push: {
					particles_nb: 4
				},
				remove: {
					particles_nb: 2
				}
			},
			mouse: {}
		},
		retina_detect: false,
		fn: {
			interact: {},
			modes: {},
			vendors: {}
		},
		tmp: {}
	};

	var pJS = this.pJS;

	/* params settings */
	if(params) {
		Object.deepExtend(pJS, params);
	}

	pJS.tmp.obj = {
		size_value: pJS.particles.size.value,
		size_anim_speed: pJS.particles.size.anim.speed,
		move_speed: pJS.particles.move.speed,
		line_linked_distance: pJS.particles.line_linked.distance,
		line_linked_width: pJS.particles.line_linked.width,
		mode_grab_distance: pJS.interactivity.modes.grab.distance,
		mode_bubble_distance: pJS.interactivity.modes.bubble.distance,
		mode_bubble_size: pJS.interactivity.modes.bubble.size,
		mode_repulse_distance: pJS.interactivity.modes.repulse.distance
	};

	pJS.fn.retinaInit = function() {

		if(pJS.retina_detect && window.devicePixelRatio > 1) {
			pJS.canvas.pxratio = window.devicePixelRatio;
			pJS.tmp.retina = true;
		} else {
			pJS.canvas.pxratio = 1;
			pJS.tmp.retina = false;
		}

		pJS.canvas.w = pJS.canvas.el.offsetWidth * pJS.canvas.pxratio;
		pJS.canvas.h = pJS.canvas.el.offsetHeight * pJS.canvas.pxratio;

		pJS.particles.size.value = pJS.tmp.obj.size_value * pJS.canvas.pxratio;
		pJS.particles.size.anim.speed = pJS.tmp.obj.size_anim_speed * pJS.canvas.pxratio;
		pJS.particles.move.speed = pJS.tmp.obj.move_speed * pJS.canvas.pxratio;
		pJS.particles.line_linked.distance = pJS.tmp.obj.line_linked_distance * pJS.canvas.pxratio;
		pJS.interactivity.modes.grab.distance = pJS.tmp.obj.mode_grab_distance * pJS.canvas.pxratio;
		pJS.interactivity.modes.bubble.distance = pJS.tmp.obj.mode_bubble_distance * pJS.canvas.pxratio;
		pJS.particles.line_linked.width = pJS.tmp.obj.line_linked_width * pJS.canvas.pxratio;
		pJS.interactivity.modes.bubble.size = pJS.tmp.obj.mode_bubble_size * pJS.canvas.pxratio;
		pJS.interactivity.modes.repulse.distance = pJS.tmp.obj.mode_repulse_distance * pJS.canvas.pxratio;

	};

	/* ---------- pJS functions - canvas ------------ */

	pJS.fn.canvasInit = function() {
		pJS.canvas.ctx = pJS.canvas.el.getContext('2d');
	};

	pJS.fn.canvasSize = function() {

		pJS.canvas.el.width = pJS.canvas.w;
		pJS.canvas.el.height = pJS.canvas.h;

		if(pJS && pJS.interactivity.events.resize) {

			window.addEventListener('resize', function() {

				pJS.canvas.w = pJS.canvas.el.offsetWidth;
				pJS.canvas.h = pJS.canvas.el.offsetHeight;

				/* resize canvas */
				if(pJS.tmp.retina) {
					pJS.canvas.w *= pJS.canvas.pxratio;
					pJS.canvas.h *= pJS.canvas.pxratio;
				}

				pJS.canvas.el.width = pJS.canvas.w;
				pJS.canvas.el.height = pJS.canvas.h;

				/* repaint canvas on anim disabled */
				if(!pJS.particles.move.enable) {
					pJS.fn.particlesEmpty();
					pJS.fn.particlesCreate();
					pJS.fn.particlesDraw();
					pJS.fn.vendors.densityAutoParticles();
				}

				/* density particles enabled */
				pJS.fn.vendors.densityAutoParticles();

			});

		}

	};

	pJS.fn.canvasPaint = function() {
		pJS.canvas.ctx.fillRect(0, 0, pJS.canvas.w, pJS.canvas.h);
	};

	pJS.fn.canvasClear = function() {
		pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h);
	};

	/* --------- pJS functions - particles ----------- */

	pJS.fn.particle = function(color, opacity, position) {

		/* size */
		this.radius = (pJS.particles.size.random ? Math.random() : 1) * pJS.particles.size.value;
		if(pJS.particles.size.anim.enable) {
			this.size_status = false;
			this.vs = pJS.particles.size.anim.speed / 100;
			if(!pJS.particles.size.anim.sync) {
				this.vs = this.vs * Math.random();
			}
		}

		/* position */
		this.x = position ? position.x : Math.random() * pJS.canvas.w;
		this.y = position ? position.y : Math.random() * pJS.canvas.h;

		/* check position  - into the canvas */
		if(this.x > pJS.canvas.w - this.radius * 2) this.x = this.x - this.radius;
		else if(this.x < this.radius * 2) this.x = this.x + this.radius;
		if(this.y > pJS.canvas.h - this.radius * 2) this.y = this.y - this.radius;
		else if(this.y < this.radius * 2) this.y = this.y + this.radius;

		/* check position - avoid overlap */
		if(pJS.particles.move.bounce) {
			pJS.fn.vendors.checkOverlap(this, position);
		}

		/* color */
		this.color = {};
		if(typeof(color.value) == 'object') {

			if(color.value instanceof Array) {
				var color_selected = color.value[Math.floor(Math.random() * pJS.particles.color.value.length)];
				this.color.rgb = hexToRgb(color_selected);
			} else {
				if(color.value.r != undefined && color.value.g != undefined && color.value.b != undefined) {
					this.color.rgb = {
						r: color.value.r,
						g: color.value.g,
						b: color.value.b
					}
				}
				if(color.value.h != undefined && color.value.s != undefined && color.value.l != undefined) {
					this.color.hsl = {
						h: color.value.h,
						s: color.value.s,
						l: color.value.l
					}
				}
			}

		} else if(color.value == 'random') {
			this.color.rgb = {
				r: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
				g: (Math.floor(Math.random() * (255 - 0 + 1)) + 0),
				b: (Math.floor(Math.random() * (255 - 0 + 1)) + 0)
			}
		} else if(typeof(color.value) == 'string') {
			this.color = color;
			this.color.rgb = hexToRgb(this.color.value);
		}

		/* opacity */
		this.opacity = (pJS.particles.opacity.random ? Math.random() : 1) * pJS.particles.opacity.value;
		if(pJS.particles.opacity.anim.enable) {
			this.opacity_status = false;
			this.vo = pJS.particles.opacity.anim.speed / 100;
			if(!pJS.particles.opacity.anim.sync) {
				this.vo = this.vo * Math.random();
			}
		}

		/* animation - velocity for speed */
		var velbase = {}
		switch(pJS.particles.move.direction) {
			case 'top':
				velbase = {
					x: 0,
					y: -1
				};
				break;
			case 'top-right':
				velbase = {
					x: 0.5,
					y: -0.5
				};
				break;
			case 'right':
				velbase = {
					x: 1,
					y: -0
				};
				break;
			case 'bottom-right':
				velbase = {
					x: 0.5,
					y: 0.5
				};
				break;
			case 'bottom':
				velbase = {
					x: 0,
					y: 1
				};
				break;
			case 'bottom-left':
				velbase = {
					x: -0.5,
					y: 1
				};
				break;
			case 'left':
				velbase = {
					x: -1,
					y: 0
				};
				break;
			case 'top-left':
				velbase = {
					x: -0.5,
					y: -0.5
				};
				break;
			default:
				velbase = {
					x: 0,
					y: 0
				};
				break;
		}

		if(pJS.particles.move.straight) {
			this.vx = velbase.x;
			this.vy = velbase.y;
			if(pJS.particles.move.random) {
				this.vx = this.vx * (Math.random());
				this.vy = this.vy * (Math.random());
			}
		} else {
			this.vx = velbase.x + Math.random() - 0.5;
			this.vy = velbase.y + Math.random() - 0.5;
		}

		// var theta = 2.0 * Math.PI * Math.random();
		// this.vx = Math.cos(theta);
		// this.vy = Math.sin(theta);

		this.vx_i = this.vx;
		this.vy_i = this.vy;

		/* if shape is image */

		var shape_type = pJS.particles.shape.type;
		if(typeof(shape_type) == 'object') {
			if(shape_type instanceof Array) {
				var shape_selected = shape_type[Math.floor(Math.random() * shape_type.length)];
				this.shape = shape_selected;
			}
		} else {
			this.shape = shape_type;
		}

		if(this.shape == 'image') {
			var sh = pJS.particles.shape;
			this.img = {
				src: sh.image.src,
				ratio: sh.image.width / sh.image.height
			}
			if(!this.img.ratio) this.img.ratio = 1;
			if(pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg != undefined) {
				pJS.fn.vendors.createSvgImg(this);
				if(pJS.tmp.pushing) {
					this.img.loaded = false;
				}
			}
		}

	};

	pJS.fn.particle.prototype.draw = function() {

		var p = this;

		if(p.radius_bubble != undefined) {
			var radius = p.radius_bubble;
		} else {
			var radius = p.radius;
		}

		if(p.opacity_bubble != undefined) {
			var opacity = p.opacity_bubble;
		} else {
			var opacity = p.opacity;
		}

		if(p.color.rgb) {
			var color_value = 'rgba(' + p.color.rgb.r + ',' + p.color.rgb.g + ',' + p.color.rgb.b + ',' + opacity + ')';
		} else {
			var color_value = 'hsla(' + p.color.hsl.h + ',' + p.color.hsl.s + '%,' + p.color.hsl.l + '%,' + opacity + ')';
		}

		pJS.canvas.ctx.fillStyle = color_value;
		pJS.canvas.ctx.beginPath();

		switch(p.shape) {

			case 'circle':
				pJS.canvas.ctx.arc(p.x, p.y, radius, 0, Math.PI * 2, false);
				break;

			case 'edge':
				pJS.canvas.ctx.rect(p.x - radius, p.y - radius, radius * 2, radius * 2);
				break;

			case 'triangle':
				pJS.fn.vendors.drawShape(pJS.canvas.ctx, p.x - radius, p.y + radius / 1.66, radius * 2, 3, 2);
				break;

			case 'polygon':
				pJS.fn.vendors.drawShape(
					pJS.canvas.ctx,
					p.x - radius / (pJS.particles.shape.polygon.nb_sides / 3.5), // startX
					p.y - radius / (2.66 / 3.5), // startY
					radius * 2.66 / (pJS.particles.shape.polygon.nb_sides / 3), // sideLength
					pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
					1 // sideCountDenominator
				);
				break;

			case 'star':
				pJS.fn.vendors.drawShape(
					pJS.canvas.ctx,
					p.x - radius * 2 / (pJS.particles.shape.polygon.nb_sides / 4), // startX
					p.y - radius / (2 * 2.66 / 3.5), // startY
					radius * 2 * 2.66 / (pJS.particles.shape.polygon.nb_sides / 3), // sideLength
					pJS.particles.shape.polygon.nb_sides, // sideCountNumerator
					2 // sideCountDenominator
				);
				break;

			case 'image':

				function draw() {
					pJS.canvas.ctx.drawImage(
						img_obj,
						p.x - radius,
						p.y - radius,
						radius * 2,
						radius * 2 / p.img.ratio
					);
				}

				if(pJS.tmp.img_type == 'svg') {
					var img_obj = p.img.obj;
				} else {
					var img_obj = pJS.tmp.img_obj;
				}

				if(img_obj) {
					draw();
				}

				break;

		}

		pJS.canvas.ctx.closePath();

		if(pJS.particles.shape.stroke.width > 0) {
			pJS.canvas.ctx.strokeStyle = pJS.particles.shape.stroke.color;
			pJS.canvas.ctx.lineWidth = pJS.particles.shape.stroke.width;
			pJS.canvas.ctx.stroke();
		}

		pJS.canvas.ctx.fill();

	};

	pJS.fn.particlesCreate = function() {
		for(var i = 0; i < pJS.particles.number.value; i++) {
			pJS.particles.array.push(new pJS.fn.particle(pJS.particles.color, pJS.particles.opacity.value));
		}
	};

	pJS.fn.particlesUpdate = function() {

		for(var i = 0; i < pJS.particles.array.length; i++) {

			/* the particle */
			var p = pJS.particles.array[i];

			// var d = ( dx = pJS.interactivity.mouse.click_pos_x - p.x ) * dx + ( dy = pJS.interactivity.mouse.click_pos_y - p.y ) * dy;
			// var f = -BANG_SIZE / d;
			// if ( d < BANG_SIZE ) {
			//     var t = Math.atan2( dy, dx );
			//     p.vx = f * Math.cos(t);
			//     p.vy = f * Math.sin(t);
			// }

			/* move the particle */
			if(pJS.particles.move.enable) {
				var ms = pJS.particles.move.speed / 2;
				p.x += p.vx * ms;
				p.y += p.vy * ms;
			}

			/* change opacity status */
			if(pJS.particles.opacity.anim.enable) {
				if(p.opacity_status == true) {
					if(p.opacity >= pJS.particles.opacity.value) p.opacity_status = false;
					p.opacity += p.vo;
				} else {
					if(p.opacity <= pJS.particles.opacity.anim.opacity_min) p.opacity_status = true;
					p.opacity -= p.vo;
				}
				if(p.opacity < 0) p.opacity = 0;
			}

			/* change size */
			if(pJS.particles.size.anim.enable) {
				if(p.size_status == true) {
					if(p.radius >= pJS.particles.size.value) p.size_status = false;
					p.radius += p.vs;
				} else {
					if(p.radius <= pJS.particles.size.anim.size_min) p.size_status = true;
					p.radius -= p.vs;
				}
				if(p.radius < 0) p.radius = 0;
			}

			/* change particle position if it is out of canvas */
			if(pJS.particles.move.out_mode == 'bounce') {
				var new_pos = {
					x_left: p.radius,
					x_right: pJS.canvas.w,
					y_top: p.radius,
					y_bottom: pJS.canvas.h
				}
			} else {
				var new_pos = {
					x_left: -p.radius,
					x_right: pJS.canvas.w + p.radius,
					y_top: -p.radius,
					y_bottom: pJS.canvas.h + p.radius
				}
			}

			if(p.x - p.radius > pJS.canvas.w) {
				p.x = new_pos.x_left;
				p.y = Math.random() * pJS.canvas.h;
			} else if(p.x + p.radius < 0) {
				p.x = new_pos.x_right;
				p.y = Math.random() * pJS.canvas.h;
			}
			if(p.y - p.radius > pJS.canvas.h) {
				p.y = new_pos.y_top;
				p.x = Math.random() * pJS.canvas.w;
			} else if(p.y + p.radius < 0) {
				p.y = new_pos.y_bottom;
				p.x = Math.random() * pJS.canvas.w;
			}

			/* out of canvas modes */
			switch(pJS.particles.move.out_mode) {
				case 'bounce':
					if(p.x + p.radius > pJS.canvas.w) p.vx = -p.vx;
					else if(p.x - p.radius < 0) p.vx = -p.vx;
					if(p.y + p.radius > pJS.canvas.h) p.vy = -p.vy;
					else if(p.y - p.radius < 0) p.vy = -p.vy;
					break;
			}

			/* events */
			if(isInArray('grab', pJS.interactivity.events.onhover.mode)) {
				pJS.fn.modes.grabParticle(p);
			}

			if(isInArray('bubble', pJS.interactivity.events.onhover.mode) || isInArray('bubble', pJS.interactivity.events.onclick.mode)) {
				pJS.fn.modes.bubbleParticle(p);
			}

			if(isInArray('repulse', pJS.interactivity.events.onhover.mode) || isInArray('repulse', pJS.interactivity.events.onclick.mode)) {
				pJS.fn.modes.repulseParticle(p);
			}

			/* interaction auto between particles */
			if(pJS.particles.line_linked.enable || pJS.particles.move.attract.enable) {
				for(var j = i + 1; j < pJS.particles.array.length; j++) {
					var p2 = pJS.particles.array[j];

					/* link particles */
					if(pJS.particles.line_linked.enable) {
						pJS.fn.interact.linkParticles(p, p2);
					}

					/* attract particles */
					if(pJS.particles.move.attract.enable) {
						pJS.fn.interact.attractParticles(p, p2);
					}

					/* bounce particles */
					if(pJS.particles.move.bounce) {
						pJS.fn.interact.bounceParticles(p, p2);
					}

				}
			}

		}

	};

	pJS.fn.particlesDraw = function() {

		/* clear canvas */
		pJS.canvas.ctx.clearRect(0, 0, pJS.canvas.w, pJS.canvas.h);

		/* update each particles param */
		pJS.fn.particlesUpdate();

		/* draw each particle */
		for(var i = 0; i < pJS.particles.array.length; i++) {
			var p = pJS.particles.array[i];
			p.draw();
		}

	};

	pJS.fn.particlesEmpty = function() {
		pJS.particles.array = [];
	};

	pJS.fn.particlesRefresh = function() {

		/* init all */
		cancelRequestAnimFrame(pJS.fn.checkAnimFrame);
		cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
		pJS.tmp.source_svg = undefined;
		pJS.tmp.img_obj = undefined;
		pJS.tmp.count_svg = 0;
		pJS.fn.particlesEmpty();
		pJS.fn.canvasClear();

		/* restart */
		pJS.fn.vendors.start();

	};

	/* ---------- pJS functions - particles interaction ------------ */

	pJS.fn.interact.linkParticles = function(p1, p2) {

		var dx = p1.x - p2.x,
			dy = p1.y - p2.y,
			dist = Math.sqrt(dx * dx + dy * dy);

		/* draw a line between p1 and p2 if the distance between them is under the config distance */
		if(dist <= pJS.particles.line_linked.distance) {

			var opacity_line = pJS.particles.line_linked.opacity - (dist / (1 / pJS.particles.line_linked.opacity)) / pJS.particles.line_linked.distance;

			if(opacity_line > 0) {

				/* style */
				var color_line = pJS.particles.line_linked.color_rgb_line;
				pJS.canvas.ctx.strokeStyle = 'rgba(' + color_line.r + ',' + color_line.g + ',' + color_line.b + ',' + opacity_line + ')';
				pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width;
				//pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

				/* path */
				pJS.canvas.ctx.beginPath();
				pJS.canvas.ctx.moveTo(p1.x, p1.y);
				pJS.canvas.ctx.lineTo(p2.x, p2.y);
				pJS.canvas.ctx.stroke();
				pJS.canvas.ctx.closePath();

			}

		}

	};

	pJS.fn.interact.attractParticles = function(p1, p2) {

		/* condensed particles */
		var dx = p1.x - p2.x,
			dy = p1.y - p2.y,
			dist = Math.sqrt(dx * dx + dy * dy);

		if(dist <= pJS.particles.line_linked.distance) {

			var ax = dx / (pJS.particles.move.attract.rotateX * 1000),
				ay = dy / (pJS.particles.move.attract.rotateY * 1000);

			p1.vx -= ax;
			p1.vy -= ay;

			p2.vx += ax;
			p2.vy += ay;

		}

	}

	pJS.fn.interact.bounceParticles = function(p1, p2) {

		var dx = p1.x - p2.x,
			dy = p1.y - p2.y,
			dist = Math.sqrt(dx * dx + dy * dy),
			dist_p = p1.radius + p2.radius;

		if(dist <= dist_p) {
			p1.vx = -p1.vx;
			p1.vy = -p1.vy;

			p2.vx = -p2.vx;
			p2.vy = -p2.vy;
		}

	}

	/* ---------- pJS functions - modes events ------------ */

	pJS.fn.modes.pushParticles = function(nb, pos) {

		pJS.tmp.pushing = true;

		for(var i = 0; i < nb; i++) {
			pJS.particles.array.push(
				new pJS.fn.particle(
					pJS.particles.color,
					pJS.particles.opacity.value, {
						'x': pos ? pos.pos_x : Math.random() * pJS.canvas.w,
						'y': pos ? pos.pos_y : Math.random() * pJS.canvas.h
					}
				)
			)
			if(i == nb - 1) {
				if(!pJS.particles.move.enable) {
					pJS.fn.particlesDraw();
				}
				pJS.tmp.pushing = false;
			}
		}

	};

	pJS.fn.modes.removeParticles = function(nb) {

		pJS.particles.array.splice(0, nb);
		if(!pJS.particles.move.enable) {
			pJS.fn.particlesDraw();
		}

	};

	pJS.fn.modes.bubbleParticle = function(p) {

		/* on hover event */
		if(pJS.interactivity.events.onhover.enable && isInArray('bubble', pJS.interactivity.events.onhover.mode)) {

			var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
				dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
				dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse),
				ratio = 1 - dist_mouse / pJS.interactivity.modes.bubble.distance;

			function init() {
				p.opacity_bubble = p.opacity;
				p.radius_bubble = p.radius;
			}

			/* mousemove - check ratio */
			if(dist_mouse <= pJS.interactivity.modes.bubble.distance) {

				if(ratio >= 0 && pJS.interactivity.status == 'mousemove') {

					/* size */
					if(pJS.interactivity.modes.bubble.size != pJS.particles.size.value) {

						if(pJS.interactivity.modes.bubble.size > pJS.particles.size.value) {
							var size = p.radius + (pJS.interactivity.modes.bubble.size * ratio);
							if(size >= 0) {
								p.radius_bubble = size;
							}
						} else {
							var dif = p.radius - pJS.interactivity.modes.bubble.size,
								size = p.radius - (dif * ratio);
							if(size > 0) {
								p.radius_bubble = size;
							} else {
								p.radius_bubble = 0;
							}
						}

					}

					/* opacity */
					if(pJS.interactivity.modes.bubble.opacity != pJS.particles.opacity.value) {

						if(pJS.interactivity.modes.bubble.opacity > pJS.particles.opacity.value) {
							var opacity = pJS.interactivity.modes.bubble.opacity * ratio;
							if(opacity > p.opacity && opacity <= pJS.interactivity.modes.bubble.opacity) {
								p.opacity_bubble = opacity;
							}
						} else {
							var opacity = p.opacity - (pJS.particles.opacity.value - pJS.interactivity.modes.bubble.opacity) * ratio;
							if(opacity < p.opacity && opacity >= pJS.interactivity.modes.bubble.opacity) {
								p.opacity_bubble = opacity;
							}
						}

					}

				}

			} else {
				init();
			}

			/* mouseleave */
			if(pJS.interactivity.status == 'mouseleave') {
				init();
			}

		}

		/* on click event */
		else if(pJS.interactivity.events.onclick.enable && isInArray('bubble', pJS.interactivity.events.onclick.mode)) {

			if(pJS.tmp.bubble_clicking) {
				var dx_mouse = p.x - pJS.interactivity.mouse.click_pos_x,
					dy_mouse = p.y - pJS.interactivity.mouse.click_pos_y,
					dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse),
					time_spent = (new Date().getTime() - pJS.interactivity.mouse.click_time) / 1000;

				if(time_spent > pJS.interactivity.modes.bubble.duration) {
					pJS.tmp.bubble_duration_end = true;
				}

				if(time_spent > pJS.interactivity.modes.bubble.duration * 2) {
					pJS.tmp.bubble_clicking = false;
					pJS.tmp.bubble_duration_end = false;
				}
			}

			function process(bubble_param, particles_param, p_obj_bubble, p_obj, id) {

				if(bubble_param != particles_param) {

					if(!pJS.tmp.bubble_duration_end) {
						if(dist_mouse <= pJS.interactivity.modes.bubble.distance) {
							if(p_obj_bubble != undefined) var obj = p_obj_bubble;
							else var obj = p_obj;
							if(obj != bubble_param) {
								var value = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration);
								if(id == 'size') p.radius_bubble = value;
								if(id == 'opacity') p.opacity_bubble = value;
							}
						} else {
							if(id == 'size') p.radius_bubble = undefined;
							if(id == 'opacity') p.opacity_bubble = undefined;
						}
					} else {
						if(p_obj_bubble != undefined) {
							var value_tmp = p_obj - (time_spent * (p_obj - bubble_param) / pJS.interactivity.modes.bubble.duration),
								dif = bubble_param - value_tmp;
							value = bubble_param + dif;
							if(id == 'size') p.radius_bubble = value;
							if(id == 'opacity') p.opacity_bubble = value;
						}
					}

				}

			}

			if(pJS.tmp.bubble_clicking) {
				/* size */
				process(pJS.interactivity.modes.bubble.size, pJS.particles.size.value, p.radius_bubble, p.radius, 'size');
				/* opacity */
				process(pJS.interactivity.modes.bubble.opacity, pJS.particles.opacity.value, p.opacity_bubble, p.opacity, 'opacity');
			}

		}

	};

	pJS.fn.modes.repulseParticle = function(p) {

		if(pJS.interactivity.events.onhover.enable && isInArray('repulse', pJS.interactivity.events.onhover.mode) && pJS.interactivity.status == 'mousemove') {

			var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
				dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
				dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse);

			var normVec = {
					x: dx_mouse / dist_mouse,
					y: dy_mouse / dist_mouse
				},
				repulseRadius = pJS.interactivity.modes.repulse.distance,
				velocity = 100,
				repulseFactor = clamp((1 / repulseRadius) * (-1 * Math.pow(dist_mouse / repulseRadius, 2) + 1) * repulseRadius * velocity, 0, 50);

			var pos = {
				x: p.x + normVec.x * repulseFactor,
				y: p.y + normVec.y * repulseFactor
			}

			if(pJS.particles.move.out_mode == 'bounce') {
				if(pos.x - p.radius > 0 && pos.x + p.radius < pJS.canvas.w) p.x = pos.x;
				if(pos.y - p.radius > 0 && pos.y + p.radius < pJS.canvas.h) p.y = pos.y;
			} else {
				p.x = pos.x;
				p.y = pos.y;
			}

		} else if(pJS.interactivity.events.onclick.enable && isInArray('repulse', pJS.interactivity.events.onclick.mode)) {

			if(!pJS.tmp.repulse_finish) {
				pJS.tmp.repulse_count++;
				if(pJS.tmp.repulse_count == pJS.particles.array.length) {
					pJS.tmp.repulse_finish = true;
				}
			}

			if(pJS.tmp.repulse_clicking) {

				var repulseRadius = Math.pow(pJS.interactivity.modes.repulse.distance / 6, 3);

				var dx = pJS.interactivity.mouse.click_pos_x - p.x,
					dy = pJS.interactivity.mouse.click_pos_y - p.y,
					d = dx * dx + dy * dy;

				var force = -repulseRadius / d * 1;

				function process() {

					var f = Math.atan2(dy, dx);
					p.vx = force * Math.cos(f);
					p.vy = force * Math.sin(f);

					if(pJS.particles.move.out_mode == 'bounce') {
						var pos = {
							x: p.x + p.vx,
							y: p.y + p.vy
						}
						if(pos.x + p.radius > pJS.canvas.w) p.vx = -p.vx;
						else if(pos.x - p.radius < 0) p.vx = -p.vx;
						if(pos.y + p.radius > pJS.canvas.h) p.vy = -p.vy;
						else if(pos.y - p.radius < 0) p.vy = -p.vy;
					}

				}

				// default
				if(d <= repulseRadius) {
					process();
				}

				// bang - slow motion mode
				// if(!pJS.tmp.repulse_finish){
				//   if(d <= repulseRadius){
				//     process();
				//   }
				// }else{
				//   process();
				// }

			} else {

				if(pJS.tmp.repulse_clicking == false) {

					p.vx = p.vx_i;
					p.vy = p.vy_i;

				}

			}

		}

	}

	pJS.fn.modes.grabParticle = function(p) {

		if(pJS.interactivity.events.onhover.enable && pJS.interactivity.status == 'mousemove') {

			var dx_mouse = p.x - pJS.interactivity.mouse.pos_x,
				dy_mouse = p.y - pJS.interactivity.mouse.pos_y,
				dist_mouse = Math.sqrt(dx_mouse * dx_mouse + dy_mouse * dy_mouse);

			/* draw a line between the cursor and the particle if the distance between them is under the config distance */
			if(dist_mouse <= pJS.interactivity.modes.grab.distance) {

				var opacity_line = pJS.interactivity.modes.grab.line_linked.opacity - (dist_mouse / (1 / pJS.interactivity.modes.grab.line_linked.opacity)) / pJS.interactivity.modes.grab.distance;

				if(opacity_line > 0) {

					/* style */
					var color_line = pJS.particles.line_linked.color_rgb_line;
					pJS.canvas.ctx.strokeStyle = 'rgba(' + color_line.r + ',' + color_line.g + ',' + color_line.b + ',' + opacity_line + ')';
					pJS.canvas.ctx.lineWidth = pJS.particles.line_linked.width;
					//pJS.canvas.ctx.lineCap = 'round'; /* performance issue */

					/* path */
					pJS.canvas.ctx.beginPath();
					pJS.canvas.ctx.moveTo(p.x, p.y);
					pJS.canvas.ctx.lineTo(pJS.interactivity.mouse.pos_x, pJS.interactivity.mouse.pos_y);
					pJS.canvas.ctx.stroke();
					pJS.canvas.ctx.closePath();

				}

			}

		}

	};

	/* ---------- pJS functions - vendors ------------ */

	pJS.fn.vendors.eventsListeners = function() {

		/* events target element */
		if(pJS.interactivity.detect_on == 'window') {
			pJS.interactivity.el = window;
		} else {
			pJS.interactivity.el = pJS.canvas.el;
		}

		/* detect mouse pos - on hover / click event */
		if(pJS.interactivity.events.onhover.enable || pJS.interactivity.events.onclick.enable) {

			/* el on mousemove */
			pJS.interactivity.el.addEventListener('mousemove', function(e) {

				if(pJS.interactivity.el == window) {
					var pos_x = e.clientX,
						pos_y = e.clientY;
				} else {
					var pos_x = e.offsetX || e.clientX,
						pos_y = e.offsetY || e.clientY;
				}

				pJS.interactivity.mouse.pos_x = pos_x;
				pJS.interactivity.mouse.pos_y = pos_y;

				if(pJS.tmp.retina) {
					pJS.interactivity.mouse.pos_x *= pJS.canvas.pxratio;
					pJS.interactivity.mouse.pos_y *= pJS.canvas.pxratio;
				}

				pJS.interactivity.status = 'mousemove';

			});

			/* el on onmouseleave */
			pJS.interactivity.el.addEventListener('mouseleave', function(e) {

				pJS.interactivity.mouse.pos_x = null;
				pJS.interactivity.mouse.pos_y = null;
				pJS.interactivity.status = 'mouseleave';

			});

		}

		/* on click event */
		if(pJS.interactivity.events.onclick.enable) {

			pJS.interactivity.el.addEventListener('click', function() {

				pJS.interactivity.mouse.click_pos_x = pJS.interactivity.mouse.pos_x;
				pJS.interactivity.mouse.click_pos_y = pJS.interactivity.mouse.pos_y;
				pJS.interactivity.mouse.click_time = new Date().getTime();

				if(pJS.interactivity.events.onclick.enable) {

					switch(pJS.interactivity.events.onclick.mode) {

						case 'push':
							if(pJS.particles.move.enable) {
								pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse);
							} else {
								if(pJS.interactivity.modes.push.particles_nb == 1) {
									pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb, pJS.interactivity.mouse);
								} else if(pJS.interactivity.modes.push.particles_nb > 1) {
									pJS.fn.modes.pushParticles(pJS.interactivity.modes.push.particles_nb);
								}
							}
							break;

						case 'remove':
							pJS.fn.modes.removeParticles(pJS.interactivity.modes.remove.particles_nb);
							break;

						case 'bubble':
							pJS.tmp.bubble_clicking = true;
							break;

						case 'repulse':
							pJS.tmp.repulse_clicking = true;
							pJS.tmp.repulse_count = 0;
							pJS.tmp.repulse_finish = false;
							setTimeout(function() {
								pJS.tmp.repulse_clicking = false;
							}, pJS.interactivity.modes.repulse.duration * 1000)
							break;

					}

				}

			});

		}

	};

	pJS.fn.vendors.densityAutoParticles = function() {

		if(pJS.particles.number.density.enable) {

			/* calc area */
			var area = pJS.canvas.el.width * pJS.canvas.el.height / 1000;
			if(pJS.tmp.retina) {
				area = area / (pJS.canvas.pxratio * 2);
			}

			/* calc number of particles based on density area */
			var nb_particles = area * pJS.particles.number.value / pJS.particles.number.density.value_area;

			/* add or remove X particles */
			var missing_particles = pJS.particles.array.length - nb_particles;
			if(missing_particles < 0) pJS.fn.modes.pushParticles(Math.abs(missing_particles));
			else pJS.fn.modes.removeParticles(missing_particles);

		}

	};

	pJS.fn.vendors.checkOverlap = function(p1, position) {
		for(var i = 0; i < pJS.particles.array.length; i++) {
			var p2 = pJS.particles.array[i];

			var dx = p1.x - p2.x,
				dy = p1.y - p2.y,
				dist = Math.sqrt(dx * dx + dy * dy);

			if(dist <= p1.radius + p2.radius) {
				p1.x = position ? position.x : Math.random() * pJS.canvas.w;
				p1.y = position ? position.y : Math.random() * pJS.canvas.h;
				pJS.fn.vendors.checkOverlap(p1);
			}
		}
	};

	pJS.fn.vendors.createSvgImg = function(p) {

		/* set color to svg element */
		var svgXml = pJS.tmp.source_svg,
			rgbHex = /#([0-9A-F]{3,6})/gi,
			coloredSvgXml = svgXml.replace(rgbHex, function(m, r, g, b) {
				if(p.color.rgb) {
					var color_value = 'rgba(' + p.color.rgb.r + ',' + p.color.rgb.g + ',' + p.color.rgb.b + ',' + p.opacity + ')';
				} else {
					var color_value = 'hsla(' + p.color.hsl.h + ',' + p.color.hsl.s + '%,' + p.color.hsl.l + '%,' + p.opacity + ')';
				}
				return color_value;
			});

		/* prepare to create img with colored svg */
		var svg = new Blob([coloredSvgXml], {
				type: 'image/svg+xml;charset=utf-8'
			}),
			DOMURL = window.URL || window.webkitURL || window,
			url = DOMURL.createObjectURL(svg);

		/* create particle img obj */
		var img = new Image();
		img.addEventListener('load', function() {
			p.img.obj = img;
			p.img.loaded = true;
			DOMURL.revokeObjectURL(url);
			pJS.tmp.count_svg++;
		});
		img.src = url;

	};

	pJS.fn.vendors.destroypJS = function() {
		cancelAnimationFrame(pJS.fn.drawAnimFrame);
		canvas_el.remove();
		pJSDom = null;
	};

	pJS.fn.vendors.drawShape = function(c, startX, startY, sideLength, sideCountNumerator, sideCountDenominator) {

		// By Programming Thomas - https://programmingthomas.wordpress.com/2013/04/03/n-sided-shapes/
		var sideCount = sideCountNumerator * sideCountDenominator;
		var decimalSides = sideCountNumerator / sideCountDenominator;
		var interiorAngleDegrees = (180 * (decimalSides - 2)) / decimalSides;
		var interiorAngle = Math.PI - Math.PI * interiorAngleDegrees / 180; // convert to radians
		c.save();
		c.beginPath();
		c.translate(startX, startY);
		c.moveTo(0, 0);
		for(var i = 0; i < sideCount; i++) {
			c.lineTo(sideLength, 0);
			c.translate(sideLength, 0);
			c.rotate(interiorAngle);
		}
		//c.stroke();
		c.fill();
		c.restore();

	};

	pJS.fn.vendors.exportImg = function() {
		window.open(pJS.canvas.el.toDataURL('image/png'), '_blank');
	};

	pJS.fn.vendors.loadImg = function(type) {

		pJS.tmp.img_error = undefined;

		if(pJS.particles.shape.image.src != '') {

			if(type == 'svg') {

				var xhr = new XMLHttpRequest();
				xhr.open('GET', pJS.particles.shape.image.src);
				xhr.onreadystatechange = function(data) {
					if(xhr.readyState == 4) {
						if(xhr.status == 200) {
							pJS.tmp.source_svg = data.currentTarget.response;
							pJS.fn.vendors.checkBeforeDraw();
						} else {
							console.log('Error pJS - Image not found');
							pJS.tmp.img_error = true;
						}
					}
				}
				xhr.send();

			} else {

				var img = new Image();
				img.addEventListener('load', function() {
					pJS.tmp.img_obj = img;
					pJS.fn.vendors.checkBeforeDraw();
				});
				img.src = pJS.particles.shape.image.src;

			}

		} else {
			console.log('Error pJS - No image.src');
			pJS.tmp.img_error = true;
		}

	};

	pJS.fn.vendors.draw = function() {

		if(pJS.particles.shape.type == 'image') {

			if(pJS.tmp.img_type == 'svg') {

				if(pJS.tmp.count_svg >= pJS.particles.number.value) {
					pJS.fn.particlesDraw();
					if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
					else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
				} else {
					//console.log('still loading...');
					if(!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
				}

			} else {

				if(pJS.tmp.img_obj != undefined) {
					pJS.fn.particlesDraw();
					if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
					else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
				} else {
					if(!pJS.tmp.img_error) pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
				}

			}

		} else {
			pJS.fn.particlesDraw();
			if(!pJS.particles.move.enable) cancelRequestAnimFrame(pJS.fn.drawAnimFrame);
			else pJS.fn.drawAnimFrame = requestAnimFrame(pJS.fn.vendors.draw);
		}

	};

	pJS.fn.vendors.checkBeforeDraw = function() {

		// if shape is image
		if(pJS.particles.shape.type == 'image') {

			if(pJS.tmp.img_type == 'svg' && pJS.tmp.source_svg == undefined) {
				pJS.tmp.checkAnimFrame = requestAnimFrame(check);
			} else {
				//console.log('images loaded! cancel check');
				cancelRequestAnimFrame(pJS.tmp.checkAnimFrame);
				if(!pJS.tmp.img_error) {
					pJS.fn.vendors.init();
					pJS.fn.vendors.draw();
				}

			}

		} else {
			pJS.fn.vendors.init();
			pJS.fn.vendors.draw();
		}

	};

	pJS.fn.vendors.init = function() {

		/* init canvas + particles */
		pJS.fn.retinaInit();
		pJS.fn.canvasInit();
		pJS.fn.canvasSize();
		pJS.fn.canvasPaint();
		pJS.fn.particlesCreate();
		pJS.fn.vendors.densityAutoParticles();

		/* particles.line_linked - convert hex colors to rgb */
		pJS.particles.line_linked.color_rgb_line = hexToRgb(pJS.particles.line_linked.color);

	};

	pJS.fn.vendors.start = function() {

		if(isInArray('image', pJS.particles.shape.type)) {
			pJS.tmp.img_type = pJS.particles.shape.image.src.substr(pJS.particles.shape.image.src.length - 3);
			pJS.fn.vendors.loadImg(pJS.tmp.img_type);
		} else {
			pJS.fn.vendors.checkBeforeDraw();
		}

	};

	/* ---------- pJS - start ------------ */

	pJS.fn.vendors.eventsListeners();

	pJS.fn.vendors.start();

};

/* ---------- global functions - vendors ------------ */

Object.deepExtend = function(destination, source) {
	for(var property in source) {
		if(source[property] && source[property].constructor &&
			source[property].constructor === Object) {
			destination[property] = destination[property] || {};
			arguments.callee(destination[property], source[property]);
		} else {
			destination[property] = source[property];
		}
	}
	return destination;
};

window.requestAnimFrame = (function() {
	return window.requestAnimationFrame ||
		window.webkitRequestAnimationFrame ||
		window.mozRequestAnimationFrame ||
		window.oRequestAnimationFrame ||
		window.msRequestAnimationFrame ||
		function(callback) {
			window.setTimeout(callback, 1000 / 60);
		};
})();

window.cancelRequestAnimFrame = (function() {
	return window.cancelAnimationFrame ||
		window.webkitCancelRequestAnimationFrame ||
		window.mozCancelRequestAnimationFrame ||
		window.oCancelRequestAnimationFrame ||
		window.msCancelRequestAnimationFrame ||
		clearTimeout
})();

function hexToRgb(hex) {
	// By Tim Down - http://stackoverflow.com/a/5624139/3493650
	// Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
	var shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
	hex = hex.replace(shorthandRegex, function(m, r, g, b) {
		return r + r + g + g + b + b;
	});
	var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
	return result ? {
		r: parseInt(result[1], 16),
		g: parseInt(result[2], 16),
		b: parseInt(result[3], 16)
	} : null;
};

function clamp(number, min, max) {
	return Math.min(Math.max(number, min), max);
};

function isInArray(value, array) {
	return array.indexOf(value) > -1;
}

/* ---------- particles.js functions - start ------------ */

window.pJSDom = [];

window.particlesJS = function(tag_id, params) {

	//console.log(params);

	/* no string id? so it's object params, and set the id with default id */
	if(typeof(tag_id) != 'string') {
		params = tag_id;
		tag_id = 'particles-js';
	}

	/* no id? set the id to default id */
	if(!tag_id) {
		tag_id = 'particles-js';
	}

	/* pJS elements */
	var pJS_tag = document.getElementById(tag_id),
		pJS_canvas_class = 'particles-js-canvas-el',
		exist_canvas = pJS_tag.getElementsByClassName(pJS_canvas_class);

	/* remove canvas if exists into the pJS target tag */
	if(exist_canvas.length) {
		while(exist_canvas.length > 0) {
			pJS_tag.removeChild(exist_canvas[0]);
		}
	}

	/* create canvas element */
	var canvas_el = document.createElement('canvas');
	canvas_el.className = pJS_canvas_class;

	/* set size canvas */
	canvas_el.style.width = "100%";
	canvas_el.style.height = "100%";

	/* append canvas */
	var canvas = document.getElementById(tag_id).appendChild(canvas_el);

	/* launch particle.js */
	if(canvas != null) {
		pJSDom.push(new pJS(tag_id, params));
	}

};

window.particlesJS.load = function(tag_id, path_config_json, callback) {

	/* load json config */
	var xhr = new XMLHttpRequest();
	xhr.open('GET', path_config_json);
	xhr.onreadystatechange = function(data) {
		if(xhr.readyState == 4) {
			if(xhr.status == 200) {
				var params = JSON.parse(data.currentTarget.response);
				window.particlesJS(tag_id, params);
				if(callback) callback();
			} else {
				console.log('Error pJS - XMLHttpRequest status: ' + xhr.status);
				console.log('Error pJS - File config not found');
			}
		}
	};
	xhr.send();

};